What exactly, as best as you can remember was done regarding that missing nand_bin error you mentioned?
Realistically, there's probably not a whole lot of hope short of a hard mod. If you somehow wrote a corrupted image to the NAND, and you don't have A9LH already installed, there's no way to get the system booted far enough along to get it to where you can write to the NAND again. The hardmod is the only way left to rewrite the contents of the chip.